258730121 has 4 divisors (see below), whose sum is σ = 278632452. Its totient is φ = 238827792.

The previous prime is 258730067. The next prime is 258730127. The reversal of 258730121 is 121037852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28783225 + 229946896 = 5365^2 + 15164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-258730121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (258730127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9951146 + ... + 9951171.

It is an arithmetic number, because the mean of its divisors is an integer number (69658113).

Almost surely, 2^258730121 is an apocalyptic number.

It is an amenable number.

258730121 is a deficient number, since it is larger than the sum of its proper divisors (19902331).

258730121 is a wasteful number, since it uses less digits than its factorization.

258730121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19902330.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 258730121 is about 16085.0900215075. The cubic root of 258730121 is about 637.2096299557.

Adding to 258730121 its reverse (121037852), we get a palindrome (379767973).

The spelling of 258730121 in words is "two hundred fifty-eight million, seven hundred thirty thousand, one hundred twenty-one".